Pin shaft inserting and pulling device

Abstract

The utility model provides a pin shaft plugging device which is used for assisting in replacing hammerheads of a metal crusher, the metal crusher comprises a rotor main shaft, paired hammer discs fixedly arranged on the rotor main shaft and a plurality of pin shafts uniformly distributed between the two hammer discs around a circumferential direction, each pin shaft is provided with a hammerhead, and the hammerheads are arranged on the pin shafts. The hammer heads can rotate around the pin shafts; the pin shaft inserting and pulling device comprises a supporting frame and a hydraulic cylinder arranged on the supporting frame, the hydraulic cylinder comprises a cylinder barrel and a piston rod movably connected with the cylinder barrel in the axial direction, and the end, away from the supporting frame in the axial direction, of the piston rod can be detachably connected with the end, facing the supporting frame, of any pin shaft. The pin shaft inserting and pulling device further comprises a limiting rod, one end of the limiting rod can be detachably connected with the end, facing the supporting frame, of the rotor main shaft, and the other end of the limiting rod can be detachably connected with the supporting frame. The pin shaft inserting and pulling device is simple in structure, and the hammerhead of the metal crusher can be replaced more quickly, conveniently and safely.

Description

Technical Field

[0001] The utility model belongs to the technical field of hammer crushers, and in particular relates to a pin shaft plugging and pulling device. Background Art

[0002] Large scrap metal crusher is a new type of high-efficiency metal crusher. Its working principle is that under the continuous drive of high-speed, high-torque motors, the hammers on the crusher rotor take turns to hit the scrap metal entering the cavity. Under the strong impact, the scrap metal is torn and squeezed into broken metal of a certain specification. After being processed by sorting equipment, high-purity broken steel / aluminum / copper and other metals can be obtained. When the hammer head is worn and needs to be replaced, it is necessary to disengage the hammer head from the pin shaft and lift it away, and then lift the new hammer head into the installation position of the pin shaft. The pin pulling device of conventional metal crushers usually requires a lot of manpower to replace the hammer head and pin shaft. In addition, in terms of design, considering the working needs of the pin pulling mechanism, a manual operation position needs to be reserved on the platform, which will cause a hole in the equipment maintenance platform and is prone to safety hazards. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the main purpose of the present invention is to provide a pin shaft plugging and extracting device to solve one or more of the above-mentioned prior art problems.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a pin shaft plugging and pulling device, which is used for assisting in replacing the hammer head of a metal crusher. The metal crusher comprises a rotor main shaft, a pair of hammer discs fixedly mounted on the rotor main shaft, and a plurality of pin shafts uniformly distributed between the two hammer discs in a circumferential direction. The hammer head is mounted on each of the pin shafts, and the hammer heads can rotate around the pin shafts.

[0006] The pin shaft plugging and pulling device comprises a support frame and a hydraulic cylinder arranged on the support frame, wherein the hydraulic cylinder comprises a cylinder barrel and a piston rod movably connected to the cylinder barrel along the axial direction, and an end of the piston rod axially away from the support frame can be detachably connected to an end of any pin shaft facing the support frame;

[0007] The pin shaft plugging and pulling device also includes a limiting rod, one end of which can be detachably connected to one end of the rotor main shaft facing the support frame, and the other end of which can be detachably connected to the support frame.

[0008] As a further description of the above technical solution, the limit rod is detachably connected to one end of the rotor main shaft toward the support frame through an adapter.

[0009] As a further description of the above technical solution, the adapter includes a first part and a second part connected in sequence, the first part is fastened to one end of the rotor main shaft toward the support frame by a fastener, and the second part can be plugged into and matched with a first plug-in part provided at one end of the limit rod.

[0010] As a further description of the above technical solution, a second plug-in portion is provided at the other end of the limit rod, and a third plug-in portion that can be plugged and matched with the second plug-in portion is provided on one side of the support frame.

[0011] As a further description of the above technical solution, a sensor electrically connected to the metal crusher controller is provided on one side of the support frame having the third plug-in portion, and the sensor is used to sense the plug-in fit between the second plug-in portion and the third plug-in portion.

[0012] As a further description of the above technical solution, at least one hanging portion is provided on the limiting rod, and the hanging portion is located between the first plug-in portion and the second plug-in portion in the axial direction of the limiting rod.

[0013] As a further description of the above technical solution, it also includes a lifting mechanism for lifting and transporting the limit rod, and the lifting mechanism includes a cantilever suspended on the support frame.

[0014] As a further description of the above technical solution, in the vertical direction, the cantilever crane is located above the hydraulic cylinder.

[0015] As a further description of the above technical solution, the end of the piston rod axially away from the support frame can be detachably connected to the end of the support frame through a quick-connect assembly and any one of the pin shafts.

[0016] As a further description of the above technical solution, the quick-connect assembly includes a first quick-connect member and a second quick-connect member; wherein,

[0017] One end of the first quick connector facing the piston rod is threadedly connected to the piston rod;

[0018] The second quick-connector is fastened to the first quick-connector by a fastener, and the end of the second quick-connector away from the piston rod has a threaded portion that can be threadedly connected to any of the pin shafts.

[0019] By means of the above technical solution, the outstanding effects of the utility model are:

[0020] The pin shaft plugging and pulling device provided by the utility model comprises a support frame and a hydraulic cylinder arranged on the support frame, the hydraulic cylinder comprises a cylinder barrel and a piston rod movably connected to the cylinder barrel along the axial direction, and the end of the piston rod axially away from the support frame can be detachably connected to the end of any pin shaft facing the support frame; the pin shaft plugging and pulling device also comprises a limit rod, one end of the limit rod can be detachably connected to the end of the rotor main shaft facing the support frame, and the other end can be detachably connected to the support frame. When the hammer head of the metal crusher needs to be replaced, it is only necessary to connect and fix the two ends of the limit rod included in the pin shaft insertion and extraction device to the support frame and the rotor main shaft respectively to lock the limited rotor main shaft, so that the pin shaft connected to the rotor main shaft through the hammer disc can be circumferentially limited, and then the piston rod of the hydraulic cylinder is axially away from the end of the support frame and connected and fastened with the pin shaft corresponding to the hammer head to be replaced toward the end of the support frame, and the pin shaft can be inserted or pulled out by the axial relative movement of the piston rod relative to the cylinder barrel to replace the hammer head. The pin shaft insertion and extraction device provided by the utility model has a simple structure, does not require a large amount of manpower, and does not require holes to be opened on the equipment maintenance platform, so that the hammer head replacement operation of the metal crusher is faster, more convenient and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a partial structural schematic diagram of a metal crusher in an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the support frame (excluding the sensor) in the embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the hydraulic cylinder in the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the limit rod in the embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the adapter in the embodiment of the utility model;

[0026] Figure 6 It is a schematic diagram of the local structure of the connection between the limit rod and the support frame in the embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of a working state of the pin shaft plugging and extracting device in the embodiment of the utility model.

[0028] Description of Figure Numbers:

[0029] 1. Hammer head; 2. Rotor main shaft; 3. Hammer disc; 4. Pin shaft; 5. Support frame; 6. Hydraulic cylinder; 7. Cylinder barrel; 8. Piston rod; 9. Limit rod; 10. Adapter; 11. First part; 12. Second part; 13. First plug-in part; 14. Second plug-in part; 15. Third plug-in part; 16. Sensor; 17. Hanging part; 18. Cantilever crane; 19. First quick connector; 20. Second quick connector. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0032] See also Figures 1 to 7 The utility model discloses a pin shaft plugging and pulling device, which is used to assist in replacing a hammer head 1 of a metal crusher, wherein the metal crusher comprises a rotor main shaft 2, a pair of hammer discs 3 fixedly mounted on the rotor main shaft 2, and a plurality of pin shafts 4 uniformly distributed between the two hammer discs 3 in a circumferential direction, each of the pin shafts 4 is mounted with the hammer head 1, and the hammer heads 1 can rotate around the pin shaft 4;

[0033] The pin shaft plugging and pulling device comprises a support frame 5 and a hydraulic cylinder 6 arranged on the support frame 5, wherein the hydraulic cylinder 6 comprises a cylinder barrel 7 and a piston rod 8 movably connected to the cylinder barrel 7 along the axial direction, and an end of the piston rod 8 axially away from the support frame 5 can be detachably connected to an end of any of the pin shafts 4 facing the support frame 5;

[0034] The pin shaft plugging and extraction device further includes a limiting rod 9 , one end of which can be detachably connected to one end of the rotor main shaft 2 facing the support frame 5 , and the other end of which can be detachably connected to the support frame 5 .

[0035] By means of the above structure, when the hammer head 1 of the metal crusher needs to be replaced, it is only necessary to connect and fix the two ends of the limiting rod 9 included in the pin shaft plug-in and extraction device to the support frame 5 and the rotor main shaft 2 respectively to lock and limit the rotor main shaft 2, so that the pin shaft 4 connected to the rotor main shaft 2 through the hammer plate 3 can be circumferentially limited, and then the piston rod 8 of the hydraulic cylinder 6 is axially away from the end of the support frame 5 and connected and fastened with the pin shaft 4 corresponding to the hammer head 1 to be replaced toward the support frame 5, and the pin shaft 4 can be inserted or pulled out by the axial relative movement of the piston rod 8 relative to the cylinder barrel 7 to replace the hammer head 1. The pin shaft plug-in and extraction device provided by the utility model has a simple structure, does not require a large amount of manpower, and does not require holes to be opened on the equipment maintenance platform, so that the replacement operation of the hammer head 1 of the metal crusher is faster, more convenient and safer.

[0036] See also Figure 1 ,as well as Figures 4 to 7 Specifically, in this embodiment, the left end of the limit rod 9 is detachably connected to the right end of the rotor main shaft 2 through an adapter 10. The adapter 10 is, for example, a flange, which includes a first portion 11 and a second portion 12 connected in sequence. The first portion 11 and the right end of the rotor main shaft 2 can be fastened and connected by a plurality of fasteners (such as bolts), and the left end of the limit rod 9 is provided with a first plug-in portion 13, which is in a groove shape and can move from top to bottom relative to the second portion 12, so that the second portion 12 can be plugged and matched therein, thereby realizing the fast fixing effect of the limit rod 9 on the rotor main shaft 2.

[0037] See also Figure 2 , Figure 4 , Figure 6 and Figure 7 Specifically, in this embodiment, the right end of the limit rod 9 is provided with a second plug-in portion 14, and one side of the support frame 5 is provided with a third plug-in portion 15 that can be plugged and matched with the second plug-in portion 14. For example, in this embodiment, the second plug-in portion 14 is generally in the shape of a rectangular plate, and the third plug-in portion 15 is in the shape of a groove with an opening upward, and a limit avoidance portion is provided on its left side wall, and the second plug-in portion 14 can be plugged into the third plug-in portion 15 from top to bottom along with the limit rod 9. Of course, in other implementations, the second plug-in portion 14 and the third plug-in portion 15 can also be other compatible plug-in structures, for example, the second plug-in portion 14 is in the shape of a groove with an opening facing upward, and the third plug-in portion 15 is in the shape of a plate that is compatible with the inner wall of the second plug-in portion 14.

[0038] See also Figure 6 Specifically, in this embodiment, a sensor 16 electrically connected to the metal crusher controller is further provided on the left side of the support frame 5, and the sensor 16 is used to sense the plug-in fit of the second plug-in portion 14 and the third plug-in portion 15. When the sensor 16 senses that the second plug-in portion 14 is plug-in fit with the third plug-in portion 15, it transmits a signal to the metal crusher controller (such as PLC), indicating that the metal crusher enters the equipment maintenance mode, making the metal crusher unable to perform production actions such as starting the main motor, thereby avoiding on-site safety accidents caused by misoperation.

[0039] See also Figure 4 , Figure 6 and Figure 7 Specifically, in this embodiment, a hanging portion 17 is provided on the limit rod 9, which is in a ring shape, so that the limit rod 9 can be moved, disassembled and assembled using a lifting tool. The hanging portion 17 is located between the first plug-in portion 13 and the second plug-in portion 14 in the axial direction of the limit rod 9. More specifically, the hanging portion 17 is axially arranged at the force balance point of the limit rod 9, so that the limit rod 9 remains horizontal during the movement, which facilitates the connection and fixation of its two ends with the rotor main shaft 2 and the support frame 5 respectively. Of course, in other embodiments, the number of the hanging portions provided on the limit rod 9 can also be other.

[0040] See also Figure 7 Specifically, in this embodiment, the pin shaft insertion and extraction device also includes a lifting mechanism for lifting and transporting the limit rod 9. The lifting mechanism includes a cantilever crane 18 arranged on the support frame 5. It has light weight, large span, and large lifting capacity, and is suitable for transporting limit rods 9 with a certain weight.

[0041] See also Figure 2 , Figure 6 and Figure 7 Specifically, in this embodiment, the support frame 5 is a two-layer structure, the hydraulic cylinder 6 is installed on the lower layer of the support frame 5, and the column of the cantilever crane 18 is installed on the upper layer of the support frame 5, so that the cantilever crane 18 and the hydraulic rod can operate without interfering with each other.

[0042] See also Figure 1 , Figure 3 and Figure 7 Specifically, in this embodiment, the left end of the piston rod 8 can be detachably connected to the right end of any one of the pin shafts 4 through a quick-connect assembly, so that the pin shaft 4 can be inserted / pulled out of the hammer disc 3 under the drive of the hydraulic cylinder 6 to replace one or more hammer heads 1 thereon.

[0043] Specifically, in this embodiment, the quick-connect assembly includes a first quick-connect member 19 and a second quick-connect member; wherein the left end of the first quick-connect member 19 is threadedly connected to the left end of the piston rod 8, and the threaded portion of the left end of the second quick-connect member can be threadedly connected to the right end of any of the pin shafts 4. The left end of the first quick-connect member 19 and the right end of the second quick-connect member can be quickly fastened and connected by fasteners. Therefore, the piston rod 8 and the pin shaft 4 to be plugged in and out can be quickly disassembled and assembled.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pin insertion and extraction device, which is used to assist in replacing the hammer head of a metal crusher, characterized in that: The metal crusher comprises a rotor main shaft, a pair of hammer discs fixedly mounted on the rotor main shaft, and a plurality of pins uniformly distributed between the two hammer discs in a circumferential direction, each of the pins is mounted with a hammer head, and the hammer heads can rotate around the pins; The pin shaft plugging and pulling device comprises a support frame and a hydraulic cylinder arranged on the support frame, wherein the hydraulic cylinder comprises a cylinder barrel and a piston rod movably connected to the cylinder barrel along the axial direction, and an end of the piston rod axially away from the support frame can be detachably connected to an end of any pin shaft facing the support frame; The pin shaft plugging and pulling device also includes a limiting rod, one end of which can be detachably connected to one end of the rotor main shaft facing the support frame, and the other end of which can be detachably connected to the support frame.

2. The pin insertion and extraction device according to claim 1, characterized in that: The limiting rod is detachably connected to one end of the rotor main shaft facing the supporting frame through an adapter.

3. The pin insertion and extraction device according to claim 2, characterized in that: The adapter comprises a first part and a second part connected in sequence, wherein the first part is fastened to one end of the rotor main shaft facing the support frame by a fastener, and the second part can be plugged and matched with a first plug-in part arranged at one end of the limiting rod.

4. The pin insertion and extraction device according to claim 3, characterized in that: A second plug-in portion is provided at the other end of the limiting rod, and a third plug-in portion which can be plugged and matched with the second plug-in portion is provided at one side of the supporting frame.

5. The pin insertion and extraction device according to claim 4, characterized in that: A sensor electrically connected to a controller for a metal crusher is also provided on one side of the support frame where the third plug-in portion is provided, and the sensor is used to sense the plug-in fit between the second plug-in portion and the third plug-in portion.

6. The pin insertion and extraction device according to claim 4, characterized in that: At least one hanging portion is provided on the limiting rod, and the hanging portion is located between the first plug-in portion and the second plug-in portion in the axial direction of the limiting rod.

7. The pin insertion and extraction device according to claim 6, characterized in that: It also includes a hoisting mechanism for hoisting and transporting the limit rod, and the hoisting mechanism includes a cantilever hung on the support frame.

8. The pin insertion and extraction device according to claim 7, characterized in that: In the vertical direction, the cantilever crane is located above the hydraulic cylinder.

9. The pin insertion and extraction device according to claim 1, characterized in that: The end of the piston rod axially away from the support frame can be detachably connected through a quick-connect assembly and an end of any one of the pin shafts toward the support frame.

10. The pin insertion and extraction device according to claim 9, characterized in that: The quick-connect assembly includes a first quick-connect member and a second quick-connect member; wherein, One end of the first quick connector facing the piston rod is threadedly connected to the piston rod; The second quick-connect member is fastened to the first quick-connect member by a fastener, and the end of the second quick-connect member away from the piston rod has a threaded portion that can be threadedly connected to any of the pin shafts.

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